body, button, dd, dl, dt, fieldset, form, h1, h2, h3, h4, h5, h6, hr, input, legend, li, ol, p, pre, td, textarea, th, ul ,i,b,a,div,header,footer,section{
  margin: 0;
  padding: 0;
  line-height: normal;
  list-style: none;
  font-style: normal;
  font-weight: normal;
  text-decoration: none;
  box-sizing: border-box;
}

body, input, textarea, select, button{
  font-family: "PingFang SC","Lantinghei SC","Microsoft YaHei","HanHei SC","Helvetica Neue","Open Sans",Arial,"Hiragino Sans GB","微软雅黑",STHeiti,"WenQuanYi Micro Hei",SimSun,sans-serif;
}

input,button{
  border: none;
  outline: none;
  background: none;
  -webkit-appearance: none;
}
html,body{
  width: 100%;
  height: 100%;
  user-select: none; 
}

body{
  position: relative;
  overflow: hidden;
}